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Filed Sept. 7, 1923 Patented Mar. 30, 1926.

MNETE rara MAXWELL C. MAXWELL, OF STANFORD, CONNECTICUT, ASSIGNOR 'lOTHE YALE & TOWNE MANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT.

LOCK.

Application filed September To all whom t may concer/n Be it known thatI, MAXWELL C. MAX- WELL, a citizen of the United States, and resident ofStamford, in the. county of Fair-- field and State of Connecticut, haveinvented certain new and useful Improvements in Locks; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to improvements in locks and more particularly tomeans whereby a lock of the cylinder type is armored, one object of theinvention being to so armor a housing in which the cylinder lock iscontained that drilling of the pins of the lock shall be prevented, sothat sawing off the housing from its supporting member shall be guardedagainst, and to provide armor means whereby the plug of the lock shallbe protected.

Vith this and other objects in view, the invention consists in certainnovel features of construction as hereinafter set forth and pointed outin the claims.

In the accompanying' drawings,-

Figure l is a face view of a lock structure Vin which my improvementsare embodied, and

Figure 2 is a sectional View.

In the embodiment of my invention shown in the drawings, a. rim lockcasing l is secured to a reinforcing plate 2 disposed against the innerface of a door 8. A hardened steel escutcheon or guard plate 4 is placedagainst the outer face of the door and. provided with bosses 5 enteringthe wood of the door, said bosses being internally threaded for thereception of bolts 6 which pass through the door and secure theescutcheon or guard plate 4 against the door and to the reinforcing'plate 2 on the inner face of the door. A cylinder lock 7 is located in asuitable opening in the door and is secured to the reinforcing plate 2by means of bolts 8. The escutcheon plate 4 is recessed to receive vthehead portion of the cylinder lock and in the opening in said plate 4which aligns with the plug of the cylinder lock 7, a hardened steelarmor disk 9 is mounted to protect said plug against drilling.

7, 1923. serial no. 661,487.

The rim lock easing` l, which is preferably made of malleable iron, isprovided with an integral enlargement forming a housing l() whichreceives an inner cylinder lock 11. This housing is provided with anopening l2 in line with the plug of the lock l1 and in this opening ahardened steel armor disl 13 is mounted to protect said plug. .ioth ofthe cylinder locks are operatively connected with the bolt mechanism ofthe rim lock but as these features form no part of my scription of thesame herein is not necessary.

rlhe housing l0 is formed with a plu` rality of ribs 14 which aresubstantially parallel with the axis of said housing and they are boredto receive hardened steel armor pins 15 which will serve to prevent thehousing or any part thereof from being sawed olf in an attempt to sawolf the cylinder lock 11 or disable the latter.

In order to prevent drilling of the pins of the lock Il to disable thelatter the housing 10 is bored at right angles to its axis for thereception of one or more hardened steel armor pins 1G which, as shown inFig ure 2, will be disposed over a vital part of the cylinder loclstructure and will prevent a boring tool inserted at the free end of thehousing from reaching such vital part of the cylinder lock ll.

Having fully described my invention what I claim as new and desire tosecure by LettersPatent, is: Y

1. In a lock structure, the combination of a housing, a cylinder lockenclosed by said housing, and armor pins located in the wall of thehousing substantally parallel' with the axis of the cylinder' lock.

2. In a lock structure, the combination of a housing, a cylinder lockenclosed by said housing, armor pins located in the wall of the housingsubstantially parallel with the axis of the cylinder lock, and an armorpin located in the end wall of the housing to protect the pins of thecylinder lock.

3. In a lock structure, the combination of a cylinder lock, a housingenclosing the same, said housing having a plurality of ribssubstantially parallel with the aXis of the same, and hardened steelarmor pins located in said ribs.

4. In a lock structure, the combination of present invention, a detailedde` a cylinder lock, a housing enclosing' the Same and havingimbeddedtherein hardened steel arinor pins substantially parallel with the axisof the housing' and having` imbedded in its end Wall a hardened steelarmor pin ai' Substantially right angles to the l'irst inentuned armorpins, said housing havingv an Opening in its end Wall in line with theplug; of the Cylinder lock, and a hardened steel disk mounted in saidOpening and in 'front of the plug' of the cylinder leek.

In estilnony whereof7 I have signed this Sperilieaion.

